Hairy royal fern Plant Care
Osmundastrum pilosum (Wall. ex Grev. & Hook.) Shmakov
Updated · Sources · How we source care data
Osmundastrum pilosum, also known as the hairy golden fern, is distinguished by its large, striking fronds that can reach up to 6 feet in length. Its vibrant green color and feathery texture make it a popular choice for shade gardens.
Every 3–7 days
Partial to full shade
60–75°F
50–80%
At a glance
How do you care for Hairy royal fern?
Water Hairy royal fern every 3–7 days, letting the top layer of soil dry out between waterings, and give it partial to full shade. It prefers temperatures of 60–75°F (16–24°C) and 50–80% humidity. Fertilize it every 6 months during the growing season.
What Is the Hairy royal fern?
Hairy royal fern (Osmundastrum pilosum) belongs to the Osmundaceae family within the Osmundastrum genus. Hairy royal fern is native to North America, Europe.
Hairy royal fern displays a large, upright fern growth habit, reaching up to 4 ft tall with a spread of approximately 3 ft. Hairy royal fern produces non-flowering.
Leaf size: approximately 36 inches.
How Often Should You Water a Hairy royal fern?
Osmundastrum pilosum requires watering every 3–7 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 3–7 days
Let soil partially dry between waterings
What Light Does the Hairy royal fern Need?
Hairy royal fern thrives in partial to full shade. The optimal light range is 100–500 lux. Avoid placing Hairy royal fern in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Partial to full shade
100–500 lux
What Temperature and Humidity Does the Hairy royal fern Prefer?
Osmundastrum pilosum grows best at temperatures of 60–75°F. Hairy royal fern prefers humidity levels of 50–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
60–75°F
Humidity
50–80%
What Soil Mix Works Best for a Hairy royal fern?
Rich, moist, acidic soil with good drainage. Good drainage is essential for Hairy royal fern to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Hairy royal fern?
Feed Hairy royal fern every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Hairy royal fern?
Repot every 2-3 years in spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Hairy royal fern?
Hairy royal fern can be propagated through division of rhizomes. Similar propagation techniques also apply to cinnamon fern plant care, which shares the same genus.
Is the Hairy royal fern Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Hairy royal fern, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Hairy royal fern?
Hairy royal fern is susceptible to snails, slugs, scale insects. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Hairy royal fern Need?
Hairy royal fern grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Hairy royal fern is native to North America, Europe. In cooler regions, grow Hairy royal fern as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Hairy royal fern is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Osmundastrum genus — compare its care with other Osmundastrum species on PlantoScan.
Osmundastrum is part of the Osmundaceae plant family — browse all Osmundaceae genera and species.
Hairy royal fern copes with lower light than most plants — browse the full list of low-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Osmundastrum pilosum (Wall. ex Grev. & Hook.) Shmakov, family Osmundaceae (first published in Opred. Paporotn. Rossii 20 (1999)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Hairy royal fern, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 13a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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